Malicious PDF — malware analysis report

Static analysis result for SHA-256 9926d6c9d92e6656…

MALICIOUS

PDF

171.7 KB Created: 2021-07-18 12:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e8008b83e42396ca14b498a13a57215 SHA-1: 42d0ddb02c16a98ceeade2766f7728ac277d2b04 SHA-256: 9926d6c9d92e6656c9fb9586a9e38d54e90d6a98ac603c085fcc80a187358b46
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs and the obfuscated document body suggest it is designed to deceive the user, likely for phishing or to download further malicious content. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/nCRFBnYrBHY/square?utm_term=george+bernard+shaw+quotes
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee54ea0a53c127f5da2fa4/1626232042365/write_an_equation_of_a_sine_function_with_a_period_of_pi_and_amplitude_of_7.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1dea27446ee35f80675de/1626463906308/kojupaxalijifenizupamu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee149b6d75c50a5d40a0c8/1626215579529/noxozube.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0f4a41d653208009955e1/1626404004269/5361925591.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec87107e2b6271615bcaf5/1626113809088/what_is_the_third_form_of_verb.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f07457488f8042adacea97/1626371159241/87378232974.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e96023e51f1f218d6bbfea/1625907235803/introductory_participial_phrase.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8540d3c986c05397245d9/1625838605720/nupevugeze.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1d064b715f87c09ba0ad4/1626460260903/22894857818.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002420e.bin
e6fbf590c6d50144b0a96032eb28d241d8db8be9c578727eee88616ba9740acb
pdf-font-stream PDF embedded font (sfnt) at offset 0x2420E 10900 bytes
font_01_sfnt_off00025ad6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x25AD6 16792 bytes
font_02_sfnt_off000272e8.bin
9eeafe11496ff365a0b86a93474e08516ce3b770a14a4c8e8b884bca6b7dfba1
pdf-font-stream PDF embedded font (sfnt) at offset 0x272E8 18020 bytes